"Panta Rhei" (everything flows) but how?

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Copper rods “swarm” like fish

“Swarming” is often seen in the animal kingdom, for example whenschools of fish rapidly change direction to evade a predator. Nowphysicists in India and the US have made collections of tiny copperrods swarm by vibrating them between two plates. The researchers claimthat their experiment shows how simple small-scale interactions cangive rise to large-scale changes in behaviour and could provide abetter understanding of swarming in living organisms (Science317 105).Copper rods “swarm” like fish (July 2007) – News – PhysicsWeb